Rectangular channel precast concrete headwalls

Rectangular Channel Headwalls are made from precast concrete for managing outfalls, with backwall heights from 775mm to 1275mm and pipe openings up to 750mm diameter. Single or multiple pipe openings, channel extensions, and fittings for gratings, handrails, and flow control devices are available.

• Precast concrete headwall for rectangular channels and pipe outfalls

• Backwall heights: 775mm, 1025mm, 1275mm

• Pipe opening sizes: up to 225mm (RCH5), up to 600mm (RCH10 A), up to 750mm (RCH10 B)

• Channel extensions can be built to required length

• Factory-fitted options for gratings, Kee Klamp handrails, walkways, and flow control devices

• Openings cast to suit specified pipe material and diameter

Applications

• Surface water outfalls

• Sewer outfalls

• Drainage channels

• Flood management systems

• Watercourse discharge points

Range

RCH5 channel headwall

• Pipework: up to 225mm

• Backwall height: 775mm

• Weight: 1245kg with each 1475mm-long extension piece weighing 1450kg

RCH10 A channel headwall

• Pipework: up to 600mm

• Backwall height: 1025mm

• Weight: 2440kg with each 1650mm-long extension piece weighing 1920kg

RCH10 B channel headwall

• Pipework: up to 750mm

• Backwall height: 1275mm

• Weight: 2810kg with each 1650mm-long extension piece weighing 2217kg

Accessories

• Penstocks

• Gratings

• Toe extensions

• Flap valves

• Klee Klamp handrails and walkways

• Outfall grilles

Installation

Channel extension pieces joined with turnbuckles and mastic sealant

Openings cast to specified invert level and pipe material